Trolley-wheel.



v No. 708,45l. Patented Sept. 2, I902. W. W. ANNABLE.

TBOLLEY WHEEL.

(Application filed Jan. 7, 1902.)

(No Model.)

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WARREN W. ANNABLE, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO APPLIANCECOMPANY, LIMITED, OF GRAND RAPIDS, MICHIGAN, A

CORPORATION OF MICHIGAN.

TROLLEY-WHEEL.

SPECIFICATION forming part of Letters Patent No. 708,451, datedSeptember 2, 1902.

Application filed January 7, 1902. Serial No. 88,807. (No model.)

To all whom it may concern:

Be it known that I, WARREN W. ANNABLE, a citizen of the United States,residing at Grand Rapids, in the county of Kent and State of Michigan,have invented certain new and useful Improvements in Trolley-WVheels;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invent-ion relates to improvements in bearings for trolley-Wheels;and its objects are to increase the bearing-surfaces, to decrease theelectrical resistance, to provide improved means of lubricating thebearing, and to provide the device with certain new and useful featureshereinafter more fully described, and particularly pointed out in theclaims.

My invention consists, essentially, in providing the trolley-wheel witha tubular axle rotative with the wheel and having both internal andexternal bearings, and, further, in making the internal bearing hollowor tubular to receive a lubricant and providing it with lateral openingsfor escape of the lubricant, and in certain details of construction andarrangement of parts, as will more fully appear by reference to theaccompanying drawings, in which- Figure 1 is aside elevation of a deviceembodying my invention; Fig. 2, a horizontal section of the same on theline 2 2 of Fig. 1, and Fig. 3 a device adapted to insert a plasticlubricant within the inner tube.

Like letters refer to like parts in all the figures.

A represents a portion of a trolley-pole, to which is secured therespective sides B B of the harp by means of a bolt B. The harp isprovided with large bosses C, forming bearings engaging the outersurface of a tubular axle G, fixed in the trolley-wheel F and rotatingtherewith and projecting laterally from the wheel. This axle does notextend wholly through the bosses C, and the openings in said bosses arereduced outside the ends of the axle G and internally threaded to engagethreads on the respective ends of the inner tube D. This tube D thusrigidly ties the outer ends of the harp sides together and alsofurnishes an internal bearing for the tubular axle G.

E E are screw-plugs closing the ends of the tube D and are removable forinsertion of a lubricant within the tube.

H II are openings for escape of the lubricant, which flows between thetubes D and G and thence outward around the ends of the tube G and overits outer surface.

By the described construction I provide a bearing consisting of theentire inner surface of the tube Gand also all of its outer surfaceexcept the small portion at the middle occupied by the trolley-wheel.This large bearing-surface thus reduces the electrical resistance of thebearing and also enables the hearing to wear longer. The inner tube isadapted to be charged with a plastic lubricant by means of a deviceshown in Fig. 3, which latter consists of a cylinder I to contain thelubricant and having a screw-threaded nozzle J at one end adapted to beinserted in place of one of the plugs E and a removable cap M at theother end having a screw-threaded opening in which is a screw-threadedstem L, having on its inner end a piston K to force the lubricantthrough the nozzle and into the tube D as the screw is turned outward'Having thus fully described my invention,

what I claim, and desire to secure by Letters Patent, is-

. 1. The combination of a trolley-wheel, a tubular axle fixed in thewheel and projecting therefrom, and bearings engaging both the interiorand exterior surfaces of the tubular axle, substantially as described.

2. The combination of a trolley-wheel, a tubular axle fixed in the wheeland projecting laterally therefrom, a harp having bearings engaging theouter surfaces of the ends of the tubular axle, and a bearing extendingthrough the axle and attached to the respective sides of the harp andrigidly connecting the same, substantially as described.

3. The combination of a trolley-Wheel, a tubular axle in the Wheel andprojecting laterally therefrom, a harp made in two parts and connectedat one end by a bolt, and at the other end by a bearing engaging theinterior of the tubular axle, and bosses on the harp having bearingsengaging the outer surfaces of the tubular axle, substantially asdescribed.

4. The combination of a trolley-wheel, a tubular axle in the Wheel andprojecting laterally therefrom,a harp having tubular bosses formingexternal bearings for the axle, screwthreaded openings in the bosses, ascrewthreaded tube engaging the threads in the bosses and having lateralopenings and also forming an internal bearing for the axle, and aremovable plug in said tube, substantially as described.

5. The combination ofa trolley-pole,a harp having two parts attached tothe pole at one end and having tubular bosses at the other end havingbearing-surfaces at their adjacent ends, and reduced and screw-threadedopenings at their outer ends, a screw-threaded tube rigidly connectingthe bosses and having lateral openings, removable plugs in said tube, arotative tubular axle internally engaging the tube andexternallyengaging the bearings in the bosses, and a trolley-wheelmounted on the axle, substantially as described.

In testimony whereof I afiix my signature 30 Witnesses:

FRANK A. SIMONDS, PALMER A. JONES.

